Friction-brake for harvesters



(No Model.)

' v H. WAGNER, Sr. FRICTION BRAKE FOR HARVESTERS.

Patented Mar. 4, 1884.

Was as:

' INITED STATES HUBERT WAGNER, sa, on

FRICTION-BRAKE BURLINGTON, WISCONSIN.

FOR HARVESTERS.

'srncrricn'rron forming part of Letters Patent No. 294,416, dated March 4,1884.

' Application filed August 27, 1883. (No model.)

To all whom it may concern.-

Be it known that I, HUBERT WAGNER, Sn, a citizen of the United States, residing at Burlington, in the county of Racineand State of Wisconsin, have invented a new and useful Double-Friction Brake for the Pitts Horse- Power, of which the following is aspecification.

My invention relates to improvements in brakes for the Pitts horse-power, in which the friction or power by which the motion of the horse-power is controlled is obtained by a direct pressure or resistance to the main shaft,

and more particularly the manner or means of obtaining or applying this pressure or friction on the mainshaft, or, in other words, its manner of conveyance to the said main shaft, as distinguished from the principle of friction as a means of retarding motion.

The object of my improvement is to provide a means of more effectually governing and controlling the motion of the Pitts horsepower at all times and under all emergencies.

I am aware that the principle of friction as a resistance of motion is elementary, and the claim which I make for my improvement is the manner of applying the friction, and also the mode of conveying it to the "point of contact.

In order to obtain any considerable friction we must have a leverage'to produce it, and in my invention I obtain my friction by the aid of a screw or direct leverage, and I also claim in my invention a double friction, which is obtained by no other brake known to me.

I obtain the object of my invention by the mechanism illustrated in theaccompanying drawings, in which-e Figure 1 is a section of the Pitts horsepower, showing the brake in position, the drawing being an end section of the power, showing the range and position of the power-platform and the sweep. Fig. 2 is the brake complete,with the exception of the brake-wheel and foot'rest, and showing the relation of the brake to the main shaft of the power. Fig. 3 represents the entire brake disconnected and separate.

In Fig. 1 A is a flanged wheel fitted onto the main shaft of thehorse-power w, and heldfirmly in its place by a key, as shown in the drawings.

B is a friction yoke or shoe let down into and between the flanges of the friction-wheel A, and when the poweris in motion is within a quarter of an inch of contact with the face of this I wheel between the flanges. O O is an iron strap suspended from the centergirt of the horse power frame, and passes underand around the lower part of this friction-wheel between the flanges, and it is this strap 0 O which produces the double friction when the brake is applied to this friction-wheel A.

D is the brake-rod,which passes through the center of the foot-rest E,which is a solid circusurface, so as to provide a foothold for the driver, and also directly through the center of the bull or main wheel, acting as an axis on which the bull-wheel revolves entering the top of the directly under the bull-wheel, and the other a movable shoulderbeinglet down on thebrakerod to the bull-wheel and secured to the brakerod by a set-screw. The thread on theend of the brake-rod D and the thread cut into the friction -yoke B are cut in such a manner that if the brake-rod D be revolved the friction-yoke B will be carried up or let down the 1 thread on the brake-rod D in accordance with the way the wheel is revolved. For instance, if the brake-rod D is revolved from left to right, the friction-yoke B will be forced down upon the friction-wheel A, and vice versa.

F is the brake-wheel, and while used as a power by two shoulders, one being stationary and the friction wheel A will in turn be forced lar sheet of cast-iron,with notches cut into its 0 friction-yoke B directly beneath the center girt I 00 Now, it is obvious that if down uponthe friction-strap ()0, and the double friction will thus be obtainedthat is, a frietion both above and belowand, if suffieient pressure be brought to bear, themotion of the main shaft entirely retardcn'l.v

Fig. 2 shows the relation of the brake to the main shaft 0. Fig. 3 represents the brake in its entirety detached from the power, and each important part from itself, lbeing the frictionwheel: 2, the point where the main shaft passes principle, broadly; but

1 i l l 1 l \Vhat I do claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, in a brake for Pitts horsepower, of a frietionyoke, B, and a friction-strap, O C, with a friction-wheel, A, being the method by which I obtain a double friction, all substantially as set forth.

2. In a brake for Pitts horse-power, the combination of a perpendicularbrake-rod, D,with a screw cut on its end, which enters a screwthread cut into a friction-yoke, B, the brakerod D having two shoulders upon it, so as to prevent its working up or down upon being revol \cd, an d the thread cut in such a manner that upon the brake-rod D being revolved the friction-yoke will be forced down upon or lifted from the friction-Wheel A, as substantially specified.

HUBER'L XVAGNER, SR.

Vitnesses:

Eowann E. MILLS, JNO. REYNOLDS. 

